Dietary Supplement With Rose Hips & Acerola Lab Verified Discussion: Vitamin C provides antioxidant activity and is intended to help support normal, healthy collagen synthesis, capillary and blood vessel integrity, cartilage and bone development, immune function and nerve impulse transmission. Calcium and magnesium have been added to buffer the natural acidity of Vitamin C. Bioflavonoids, including Rose Hips and Acerola, are intended to aid in the absorption and bioavailability of Vitamin C.